Spbing-opebaele esain valve



June 15 192s. 1,589,252l

` H. B. SHERMAN SPRING- OPENABLE DRAIN VALVE Original Filed Jan. 19l 1922 seat against the action of the spring 9, and when the disk is seated the iiow'ot water through the bore of the plug is prevented. `When the water is cut oit from pipe l the pressure is relieved and the spring 9c raises valve disk 9 and the water then drains out oie the valve past the stem.

The pipe l may be ot any desired length and any number of sprinkler headsmay be attached thereto, according to the length of the surface S to be sprinkled and the desired distance apart ot' the heads 5. The last sprinkler head may be connected with the pipe l by means ot' a T 3X it' desired, and the drain valve placed in the lower end of the T as indicated inl Fig. 1.

The supply pipes l are preferably laid im mediately below the, surface while the sprinkler heads are preferably set flush with the roots ofthe grass,'so that the lawn can be cut with a lawn mower without interfering with theheads. W hen it is desired to sprinkle the lawn the water,isturnedrinto a section ot this piping, and the series of connected heads 5 begin to operate; then when sucharea ot lawn is properly sprinkled this section is cut ofi?, and another section turned on. The heads 5 will spray the water over a large surface thus reducing the number of heads required for a givenarea.l F ig. 1 ot the drawings simply indicates one section ot a sprinkler system, but it is obvious that any desired number of such sectionsmay be used according to the area to be covered.

The said automatic drain valves are easy of installation, and automatic in operation. lith such novel drain valves it is not necessary to lay the pipe so that itvwill slope to a certain point to enable it to be drained. They require no special mechanical skill on the part of the installer. hey can be installed by using ordinary piping and vmalleable iron fittings now on the market, and do not have to be looked after in cold weather; and when the water pressure is cut oti the drain valves automatically open and the water is drained out ot' the pipes,

lVhat l claim is:

l. 'An automatic spring openable drain valve comprising a tubular plug having an .axial bore, a 'valve seat at the inner end ot its bore, aslioulderb'elowthe seat, and a noncylindric reces'sv'b'elovv the shoulder.; a valve diskadapted to it'said seat and, having a stem depending through the borey Vand in to the recess below said shoulder a non-cylindric nuton the stem' to vretain the valve' disk in the plug and limit its opening movement, saidV nut permitting water to pass through the recess and being slidably but non-rotatably coniined in said non-cylindric recess; and a spring for automatically unseating the said valve disk when the water pressure is cut otl.

2. In combination, a water supply pipe a coupling connected in said pipe; a drain valve in the lower branch of said coupling, said valve comprising a plug having an axial bore, a valve seat at the upper end ot said bore, a valve disk for said seat; a stem connected to said disk, the lower end ot said bore being non-cylindrical, and a noncylindrical member on the lower end or said stem slidably and non-rotatably conlinedV inV said recessbut permitting water to pass therethrough, and adapted to limitrthe opening movement of said disk.

3. In combination an underground water supply pipe; a coupling connected to said pipe; a drain valve in the lower branch oi said coupling; said drain valve comprising a plug having an axial bore; a valve seat at the upper end oi said bore; a valve disk iitted to said seat; a valve stem connected with the disk, the lower end oit said bore being non-cylindrical, a. non-cylindrical member on the lower end ot said'stem slidably and non-rotatably confined in said recess but permitting water to pass therethrough and adapted t0 limit the opening movement of said disk; and apspring adapted to automatically li'ft the valve disk when the water supply is cut oil.

el. An automatic spring openable drain valve, comprising an externally threaded plug adapted to be screwed into a member to he drained; said plug having an axial bore, a valve seat at the upper end of the bore, a shoulder below the seat; and a non-cylindric recess below said shoulder; a valve disk adapted to lit said seat and having a stem depending through the bore and below said shoulder, and into said recess; spring. means for automatically normally lifting the disk when the water pressure is cut oil", and a non-cylindric member on the lower end of said stem slidably engaging the walls ot said non-cylindric'recess but allowing water to vpass therethroughand adapted to limit the opening movement of the disk.

in testimony that I claimthe foregoing as my own, I afiix my signature. i

neunten B. sunnites. 

